George roth



G. ROTH. JAGQUARD MACHINE.

No. 12,072. Patente@ Dec. 12,1854.

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UNITED .sfr-Aras rATENr orsi-oil.

GEORGE ROTH, or NEW YORK, N. Y.

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Specification of Letters Patent Noi. 12,072, dated December 12,

T0 all whom, t may] concern:

city, county, and State of New York, have invented a new and usefulImprovement in the Jacquard Machine; and-I do hereby de clare that thefollowing is a full, clear, and exact description of the same,reference'being had to the accompanying drawings, forming part of thespecifications, in which- Figure l, is a vertical section of a jacquardmachine constructed according to my 1n-' vention. F ig.2, is a top Viewof the same. Figs. 3 and 4 are elevations of modifications of myinvention. i

Similar letters o-f reference indicate corresponding parts intheseveralfigures.

' The object of this'invention is to balance` the weights or theirequivalent which are attached to the ascending cords ofthe harness bymeans of those which are attached to the other cords and thereby savethe exframe andtheneckboard being entirely independent of each other,and the weightsvor springs attached to the cords which are caught by thegriff frame create such an amount of resistance to the movement of thesaid frame, as is due to their gravity. This is the cause of a greatamount of useless expenditure of power in power looms, but in hand loomsit is the cause of much more serious drawbacks, as the weaver, raisingthe harness by the action of his feet upon treadles, is unable to raisemore than a certain weight., and as a certain weight is necessary to beattached to each cord it is impossible to use more than a cert-ainnumber of heddles and therefore it has been impossible in heavy weavingto produce as elaborate patterns by thehand as by power loom. The abovedisadvantage is entirely overcome by my invention which consists insuspending the grif frame and the neck board from, or attaching them insuch a way as to be capable of a free movement, to opposite arms oflevers on a rock shaft. The weights of the cords which are missed by thegri' frame will always nearly balance those which are caught 4by it andthus theweight to be raised by the driving power of the loom can neverbe considerable, and a very -Be it ,knownthat I, ,GEORGE'ROTIL of the ysteady motion ofthe harness is insured. Y A, represents the griff frame,and a, a, the bars by which the perpendicular hooked rods b, from whichthe harness is suspended are caught as directed by the operation of thecylinder and cords (which are not shown) upon the needles c, c.

B, is the neck bo-ard, d, cl, are the harness l cords which are supposedto be attached to the perpendicular rods 5,5, in the usual way, andarerepresented as having the proper de.- greev of tension prod uced uponthem by springs e, e, but instead of these springs, it is preferable tosuspend weights from them in the usual manner.

All the aboveparts are similar to the corresponding parts of the Frenchjacquard machine except that the griff frame A, is att-'ached to arms o,c, which vibrate from fixed points orpivots f, f, in the framing of themachine, and the neck board B, is attached to similar arms D, D, whichvibrate. from fixed points g,vg.

The griff frame, may be arranged to work in Vertical guides as theFrench lmachine,

`and the griff frame similarly arranged, so

that they will always maintain a parallel relation to each other, but Iconsider the arrangement represented tobe the best as it givesall thecords of the harness s uch motions aswill cause all the threads of thewarp to shed parallel with each other.

The upper part of the framing contains suitable bearings for alrock-shaft E, upon which, close within the sides of the framing aresecured two levers 71 L, having arms of equal length. To one arm of eachof the above levers,l the griff frame A, is attached by a rod i; and tothe other arm of each, the neck board is attached by a rod y'. Thenumber of rods which are missed vby the grift1 frame and supported bythe neck board will usually be nearly' the same as those caught by thegriff frame, and if the grii frame and neck board are of equal weight,as I propose to make them, they will be at all times nearly balanced.

The motion of the harness is intended to be communicated by therock-shaft E, which will receive the necessary rocking motion from thetr'eadles, of a hand loo-m, or from a crank or eccentric on the mainsha-ft of a power loom, or by any other suitable means.

In order the better to insure the catching of the hooked rods b, b, bythe bars a, a, of the griff frame, it is better that the upward movementof the neck board should terminate a little earlier, and its downwardmovement commence a little later than the corresponding downward andupward movements of the griff' frame so that the neck board should bestationary for a short time in its highest position. To effect this, ina hand loom instead of connecting the neck board directly with the rodsy', I allo-w it to rest as shown in Fig. 3 upon a cam e, at each side ofthe machine, the said cams being secured to a transverse rock shaft Z,placed in suitable bearings. The cams are connected with the rods j, andare of such fo-rm that they will lift the neck board the requireddistance quicker than the griff frame is lowered and allow the neckboard to remain stationary during the remaining portion of the movementsof the levers 72 h and rods z', j; a part of the periphery of each beingan arc described from the axis of their rockshaft. By this intermissionor suspension of their motion, time is allowed fo-r the needles to movethe hooked rods, and the failure of their hooks to catch theirrespect-ive bars of the griff frame is effectually prevented. Byproperly proportioning the cams, and the distance of the pins m, whichattach the rods y', to them, from the axis of the rock shaft, thebalance o-f the griff frame and neck board will as far as is practicallynecessary, be preserved.

In a power loom where there is a continuous rotary motion, I prefer touse for the purpose of obtaining the above result, the arrangement shownin Fig. 4, where m, and n, are two shafts carrying pulleys 0, o, ofequal size connected by a belt s, either of the two shafts receiving acontinuous rotary moton by a belt or gearing from the crank shaft or theshaft of the loom. The lower shaft n, carries a cam g, which supportsthe neck board B, and the upper shaft m, a cam p, in a groove in whichthe griff frame A, is suspended by a rod r. The two cams 7J, q, are ofsuch form as to produce movements the reverse of each other, each havingone half of its periphery in t-he form of a semicircle to cause asuspension of motion, the other half of 7), being of such form as firstto lower and then to raise the frame, and the other half of q, being ofsuch form as first to raise and then to lower the neck board. Thecircular parts of the two being so arranged relatively to each other asto act together, will cause the griff frame to rise as the neck boarddescends, and the griff frame to descend /as the neck board rises. Thiscauses the same eect to be produced in both the griff frame and neckboard as the arrangement shown in Fig. 3, causes to be produced on theneck board only. The griff frame and neck board bythis arrangement arecaused by the belt and pulleys to balance each other perfectly.

What I claim as my invention and desire to secure by Letters Patent is-Suspending the griff frame and the neck board, wholly or in part, fromopposite arms of levers 7L, h, on a rock shaft E, or what is equivalent,on cams p, q, on rotary shafts o, 0, in such a manner that the weight ortension of those cords of the harness which are caught by the griffframe shall be balanced or nearly so by the weight or tension of thosewhich are missed by the said frame and rest on the neck board,substantially in the manner and for the purposes as herein set forth.

GEORGE ROTH.

Vitnesses:

DAVID MAY, WM. SINCLAIR.

